The application of transputers for digital control of static VAr compensators

This paper discusses the advantages of using digital control systems for static VAr compensators (SVC) and describes the implementation of such a digital control system using transputer technology. The application of digital controls to SVC is demanding in terms of system hardware and software, particularly the processing power and intersystem communications required to achieve a performance equivalent to the latest analogue controllers. One approach in adopting a digital solution for an SVC controller is by the use of concurrent processing. This can be implemented by the INMOS family of transputers, which are particularly suitable. A description of some aspects of the digital design is given and also test results taken from comparative studies on the performance of analogue and digital SVC controls. These studies were performed on a real time analogue simulator model and show that the digital implementation has been successful in reproducing a performance equivalent to an analogue control